To reload the page with a certain tab being selected you need to use the tabidXXX parameter (XXX is Tabs object's id, 1 by default). First of all, turn on debug mode so that you would be able to see all tabs ids (see debug_info.jpg).

Suppose you want to open the Tabs object with 'Rome' tab (id is 1_1_1_3_1) being selected. Then the link you should use is 'index.php?tabid1=1_1_1_3_1'You can even navigate to it from inside the Tabs themselves.